Car truck



J. WORMS CAR TRUCK Nov. 20, 1928. 1,692,606

Filed Dec. 19, 1927 Y 2 Sheets-Sheet l INVENTQR I Jaques Worms ATTORNEYSNov. 20, 1928.

' J. WORMS CAR TRUCK Filed Dec. 19, 1927 2 Sheets-Sheet 2.

- INVENTOR hcques firms ATTORNEYS Patented Nov. 20, 1928.

UNITED {STATES PATENT JACQUE Worms, onr nis, FRANCE, ,ASSIGNOR TO THE;J. G. BRILL COMPANY, OF .rn nenrgm'nm, m nnsynvanm, A CORPORATION onrnimsynvema.

CAR TRUCK- Application filed December 19, 1927,.Seria1 No. 241,086 andin Francev Dec.ember 30, 1926.

"This invention relates to car trucks and especially to improvementsi-nthe suspension of the truclcchassis of the type shown in the Patent#GlOJlQtOrG. Brill et [11,, dated August 30, 1898, .for pivotal truck,andin the Patent #1,449,935 to J. A. Brooks for car truck, dated I March27, .1923.

One objectof the invention is .to provide an elastic suspension for car,trucks so that .thelateralmovelnenhwhich is-p-roduced when thevehicle.enters a curve WilLbe prevented.

Another object is to provide suspension means forcartrucks wherein theWeight of the bodyanountedion the pivot-bolster of the truck will becarriedover to the sidebars in the neighborhood .of .the axle.

Another objectisto so construct, a car truck that the suspension ofthelevers from the side-bars of the truck-chassis, in, the neighborhood ofthe pedestals of the journalboxes, is effected byineans ota system ofparallel links or "hangers constituting a changeable parallelogram.

Another obj ect is .to produce an efficient, strong and durable. cartruck which may be economically constructed.

Ot-her A obj ect-s and advantages will herein- I atterappear.

'The'iviewsof the drawings are:

Figure 1 is a side elevation-of a portionof a car truck constructedaccording -.to. the invention;

Fig. 2 is a vertical transverse section as seen from the line Q-Q ofFig. 1

Fig. 3 is an enlarged elevationof the suspension means shown inzFig. 1;

' Fig.4 is anelevation,partly insection, as seen fromthe line 4- of Fig.'3

Fig. 5 is a detail vertical section taken :on.

the line5-5 of Eig. 4/ showing the construe ;tion ofthebearing, and

Fig.6 is aseetion Sl-II'HlELI'rtO'FIg. 5.shoW1ng a modification of thebearing.

This invention applies more especially to trucks on which the carchassis rests in a longitudinal direction in the middle of an elasticsuspension on journal boxes, and here thdweight of th'e body "is 1carried by sills, which if desiredmay be in the neighborhood ofthe-axles, 'duetdthe useof equalizing bars carrying, by means oftruck-bolsters,

transverse elliptical springs that-support athepivot-bolster ofthe-truck.

This type of truck, which. is already old,

and has resilient suspension bases havingthe longest possible dimension,is made especial- 1y for loads which are somewhat heavy and heel-basesWhich are somewhat long. I I

On theother hand,1the transverse stability of this truck with equalizingbars which are suspended from the side-bars,' hichshould .be excellent,in view oftheifactthat the elliptical springs are carriedthere by asystem .restincrease in length, due to the. compression of the springthey contain,whereas-the correr --sponding devices located attheinsideoi' the curve have a tendency to decreasein length, as thespringithey containis thenunburdened.

-;'lherefore, the body getsra certain inclination, and-shows, whenthetruck gets hack to a tangent, the tendency of inclining .towardaninverse[direction andimaking. a,balancing movement. It. is renderedstill-more difficult :to overcome .this balancing ,movernent .the more,since the-equalizing springs contained in the clamps areahelical,and--there fore;have 7110 friction. v

[Ellis inventionisl, designed tom e edy.these i o ve ie by eli ina i gany =re il e part, spring or .else contained in the'hangersof :theequalizing bars, and by replacing these hangers by a system of parallellinks forming a ehangeable parallelogram. These links are jointed attheirends to v the body of theside-barr at one pl-ace, and to seatcomprising an element of adjust able height lIl'WlllCll theend ofvtheequalizingbar is pinned.

Due to this disposition, the suspension .systern of .the equalizing harsmaintains a contant :length, {which elirninatesythe causes of .:theabove mentioned balancing.

Moreover, this system. of 5 suspension permits all possibletransverse-displacement of the pivot-bolster, when the vehicle runs intocurves, at the same time avoiding transverse oscillations on thetangent.

This result is another advantage of the invention, for theclamp-suspensions with which the transverse displacement of thepivot-bolster is obtained by the swinging of the upper part of the clampin a rounded field, either on the longitudinal edges of the sidebar, orby the gliding of this part on cylindric expansion of the sidebar, whichresults either in construction forms that are difficult to realize or insuspensions of too great a mobility or ainobility which is insufficient.

Therefore, the invention consists in combining the following threecharacteristics in a suspension forcar trucks:

1. The body of the chassis rests directl on the journal boxes by meansof a resi ient suspension. 1

2. The weight of the body mounted on the pivot-bolster of the truck iscarried over to the side-bars in the neighborhood of the axles by meansof equalizing bars suspended from the side-bars'and carrying ellipticaltransverse springs support-ing the pivot-bolster.

The suspension of the levers from the side-bars of the truck-chassis, inthe neighborhood of the pedestals of the journal boxes, is

effected by means of a system of rods jointed attheir upper ends aroundpins suspended on the sidebar, and at their lower end around pinscarried by a seat comprising an element of adjustable height, in whichthe end of the lever is pinned.

The subject of the invention will be understood more clearly byreferring to the accompanying drawings wherein, by way of ex ample, atruck of the type described equipped with the suspension deviceaccording to the invention is shown.

The truck has side-bars 1, the ends of which rest on journal boxes 2,being supported thereon by means of a resilient suspension, such forinstance, as helical springs 3.

Beneath the side-bars 1 are equalizing bars ton which the spring planks5 of the frame are attached, thus supporting elliptical springs 6 onwhich the pivot-bolster of the truck is placed in the usual way.

As shown, in Figs. 1 and 2, the springs 6 are disposed transversely ofthe truck, being,

located beneath the side-bars 1, and above the equalizing bars 4.

The disposition of the bars 4 with respectto the side-bars 1 is suchthat the bars 4 are offset slightly from the side-bars, being locatedfurther outside the truck than are the side-bars.

The ends 7 of the bars 4 have bearings 8 fixed thereto by any suitablemeans. The bottom of the bearings have a rib 9 depending therefrom for apurpose to be hereinafter more fully described.

For the purpose of suspending the equalizing bars 4 from the side-bars1, use is made of brackets 10 which are mounted on the sidebars andfixed thereto by means of bolts 11.

The brackets 10 are so formed as to straddle the side-bars. Oneach sideof the brackets there are laterally disposed pairs of checks 12. Eachpair of cheeks is provided with alined' openings through which pins 13are passed.

The side-bars have the brackets 10 afiixed thereto in such a way thatthe brackets overlie the ends 7 of the equalizing bars.

Pivoted to the brackets are links or hangers 14. These links have eyes15 and 16 formed in their ends, the pins 13 being passed through theeyes 15.

The ends of the links 14 having the eyes 16 are positioned between pairsof cheeks 17 of saddles 18, the cheeks 17 being formed with openingsthrough which pins 19 are passed in much the same manner as the pins 13.

In this way, one end of each link is pivoted to the bracket, while theother end of each rod is pivoted to thesaddle.

The saddles 18 are adapted to support the ends of the bars 4, and forthis purpose, each saddle, intermediate the pairs of checks 18, isformed with a recess, providing a seat 20 for the bearing 8. i

The seat 20 has a groove 21 formed in its bottom for receiving the rib 9on the bearings. In this we the ends of the bars 4 will be prevented rombeing dis laced from the saddles, as will be readily un erstood.

The construction is such that the brackets 10, saddles 18 and links 14constitute changeable parallelograms, in which the saddles will be freeto oscillate about the pivots provided by the pins 13.

In this way means are provided for pre venting swinging resulting fromthe variations of inclination in the curves. The two links 14, swingingaround the pins 13 attached on either side of the sidebar, allow thepivot-bolster to shift transversely when the vehicle runs in curves;however, the rods remain in their average position on the tan gent.

In order to facilitate the adjusting of the height of the vehicle and tooflset the Wearing out of the tires of the wheels and of theaxle-journal brass parts, the seats 20 may have blocks 23 insertedtherein between the bottom of the bearings 8, such blocks having thedesired thickness and being formed on one side with a slot 24 forreceiving the rib 9 of the bearings, and having a depending rib 25formed on their opposite sides for meshing with the grooves 21 of theseats 20, (see Fig. 6). It will be understood that it is very easytoinsert the blocks'23 in between the bearings 8 and seats 20, in viewof the fact that the levers 14 that are accessible from the outside mayeasily be lifted.

The invention set forth herein is, of course, susceptible of variousmodifications and adaptations.

The invention claimed is:

1. In combination with a truck frame including sidebars, equalizing rodsdisposed beneath said side-bars and disposed in offset relation thereto,and means for suspending the levers from the side-bars comprisingstructure in the form of a changeable parallelogram, one end of which ispivotally connected to said side-bars and the other end of which ispivotally connected to the end of the said rods.

2. In combination With a truck frame in eluding side-bars having theirends resting on journal boxes and supported thereon by an elasticsuspension, of means whereby the Weight of the body mounted on thepivot-bob ster of the truck is carried over to the sidebars, in theneighborhood of the axles, said means including equalizing rodssuspended from the side-bars and carrying the supports of transverseelliptical springs maintaining the pivot-bolster.

3, In combination With the side-bars of a truck, equalizing rodsdisposed beneath said side-bars and disposed in ofi'set relationthereto, a bracket fixed to the side-bars and overlying each end of thesaid rods, abearing on each end of the said rods, a saddle having a seatfor the said bearing, and means pivotally connected to the said bracketand to the said saddle for suspending the rods from the said side-bars.V

4. In combination With the side-bars of a truck, equalizing rodsdisposed beneath said side-bars and disposed in offset relationt-herato, a bracket fixed to the side-bars and overlying each end of the saidrods, a bearing on each end of the said rods, a saddle having a seat forthe said bearing, means for preventing displacement of the bearing fromits seat in the saddle, and means pivotally connected to the saidbracket and to the said saddle for suspending the rods from the saidside-bars.

5. In combination With the side-bars of a truck equalizing rods disposedbeneath said side-bars and disposed in offset relation thereto,a bracketfixed to the side-bars and overlying each end of the said rods, a bearing on each end of the said rods, a saddle having a seat for the saidbearing, means for preventing displacement of the bearing from its seatin the saddle, means for adjusting the height of the bearing relative toits position in the said saddle, and means pivotally connected to thesaid brackets and to the said saddle for suspending the rods from thesaid sidebars.

JACQUES WORMS.

